trimethylaluminum
Trimethylaluminium or TMA is one of the simplest examples of an organoaluminium compound. Despite its name it has the formula (abbreviated as , where Me stands for methyl), as it exists as a dimer. This colorless liquid is pyrophoric. It is an industrially important compound, closely related to triethylaluminium.
Chemical data
- Formula
- C3H9Al
- Molecular weight
- 72.09 g/mol
- IUPAC name
- trimethylalumane
- SMILES
- C[Al](C)C
- InChIKey
- JLTRXTDYQLMHGR-UHFFFAOYSA-N
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Formal charge
- 0
via PubChem
Article
14 sectionsContents
- Structure and bonding
- Synthesis
- Applications
- Catalysis
- Semiconductor applications
- Photovoltaic applications
- Reactions
- Hydrolysis and related protonolysis reactions
- Reactions with metal chlorides
- Adducts
- Synthetic reagent
- Safety
- References
- External links
Trimethylaluminium or TMA is one of the simplest examples of an organoaluminium compound. Despite its name it has the formula (abbreviated as , where Me stands for methyl), as it exists as a dimer. This colorless liquid is pyrophoric. It is an industrially important compound, closely related to triethylaluminium.
==Structure and bonding== The structure and bonding in and diborane are analogous (R = alkyl). In , the Al-C(terminal) and Al-C(bridging) distances are 1.97 and 2.14 Å, respectively. The Al center is tetrahedral. The carbon atoms of the bridging methyl groups are each surrounded by five neighbors: three hydrogen atoms and two aluminium atoms. The methyl groups interchange readily intramolecularly. At higher temperatures, the dimer cracks into monomeric .